index.js.map 9.84 KB
{"version":3,"names":["anyTypeAnnotation","isAnyTypeAnnotation","isArrayTypeAnnotation","isBooleanTypeAnnotation","isEmptyTypeAnnotation","isFlowBaseAnnotation","isGenericTypeAnnotation","isIdentifier","isMixedTypeAnnotation","isNumberTypeAnnotation","isStringTypeAnnotation","isTSArrayType","isTSTypeAnnotation","isTSTypeReference","isTupleTypeAnnotation","isTypeAnnotation","isUnionTypeAnnotation","isVoidTypeAnnotation","stringTypeAnnotation","voidTypeAnnotation","getTypeAnnotation","type","getData","_getTypeAnnotation","typeAnnotation","setData","typeAnnotationInferringNodes","WeakSet","node","key","parentPath","isVariableDeclarator","declar","declarParent","isForInStatement","isForOfStatement","has","add","inferer","inferers","call","validParent","delete","isBaseType","baseName","soft","_isBaseType","Error","couldBeBaseType","name","type2","types","baseTypeStrictlyMatches","rightArg","left","right","isGenericType","genericName","id","typeName"],"sources":["../../../src/path/inference/index.ts"],"sourcesContent":["import type NodePath from \"../index\";\nimport * as inferers from \"./inferers\";\nimport {\n  anyTypeAnnotation,\n  isAnyTypeAnnotation,\n  isArrayTypeAnnotation,\n  isBooleanTypeAnnotation,\n  isEmptyTypeAnnotation,\n  isFlowBaseAnnotation,\n  isGenericTypeAnnotation,\n  isIdentifier,\n  isMixedTypeAnnotation,\n  isNumberTypeAnnotation,\n  isStringTypeAnnotation,\n  isTSArrayType,\n  isTSTypeAnnotation,\n  isTSTypeReference,\n  isTupleTypeAnnotation,\n  isTypeAnnotation,\n  isUnionTypeAnnotation,\n  isVoidTypeAnnotation,\n  stringTypeAnnotation,\n  voidTypeAnnotation,\n} from \"@babel/types\";\nimport type * as t from \"@babel/types\";\n\n/**\n * Infer the type of the current `NodePath`.\n */\n\nexport function getTypeAnnotation(this: NodePath): t.FlowType | t.TSType {\n  let type = this.getData(\"typeAnnotation\");\n  if (type != null) {\n    return type;\n  }\n  type = this._getTypeAnnotation() || anyTypeAnnotation();\n  if (isTypeAnnotation(type) || isTSTypeAnnotation(type)) {\n    type = type.typeAnnotation;\n  }\n  this.setData(\"typeAnnotation\", type);\n  return type;\n}\n\n// Used to avoid infinite recursion in cases like\n//   var b, c; if (0) { c = 1; b = c; } c = b;\n// It also works with indirect recursion.\nconst typeAnnotationInferringNodes = new WeakSet();\n\n/**\n * todo: split up this method\n */\n\nexport function _getTypeAnnotation(this: NodePath): any {\n  const node = this.node;\n\n  if (!node) {\n    // handle initializerless variables, add in checks for loop initializers too\n    if (this.key === \"init\" && this.parentPath.isVariableDeclarator()) {\n      const declar = this.parentPath.parentPath;\n      const declarParent = declar.parentPath;\n\n      // for (let NODE in bar) {}\n      if (declar.key === \"left\" && declarParent.isForInStatement()) {\n        return stringTypeAnnotation();\n      }\n\n      // for (let NODE of bar) {}\n      if (declar.key === \"left\" && declarParent.isForOfStatement()) {\n        return anyTypeAnnotation();\n      }\n\n      return voidTypeAnnotation();\n    } else {\n      return;\n    }\n  }\n\n  // @ts-expect-error typeAnnotation may not index node\n  if (node.typeAnnotation) {\n    // @ts-expect-error typeAnnotation may not index node\n    return node.typeAnnotation;\n  }\n\n  if (typeAnnotationInferringNodes.has(node)) {\n    // Bail out from type inference to avoid infinite loops\n    return;\n  }\n  typeAnnotationInferringNodes.add(node);\n\n  try {\n    let inferer =\n      // @ts-expect-error inferers do not cover all AST types\n      inferers[node.type];\n    if (inferer) {\n      return inferer.call(this, node);\n    }\n\n    // @ts-expect-error inferers do not cover all AST types\n    inferer = inferers[this.parentPath.type];\n    if (inferer?.validParent) {\n      return this.parentPath.getTypeAnnotation();\n    }\n  } finally {\n    typeAnnotationInferringNodes.delete(node);\n  }\n}\n\nexport function isBaseType(\n  this: NodePath,\n  baseName: string,\n  soft?: boolean,\n): boolean {\n  return _isBaseType(baseName, this.getTypeAnnotation(), soft);\n}\n\nfunction _isBaseType(\n  baseName: string,\n  type?: t.FlowType | t.TSType,\n  soft?: boolean,\n): boolean {\n  if (baseName === \"string\") {\n    return isStringTypeAnnotation(type);\n  } else if (baseName === \"number\") {\n    return isNumberTypeAnnotation(type);\n  } else if (baseName === \"boolean\") {\n    return isBooleanTypeAnnotation(type);\n  } else if (baseName === \"any\") {\n    return isAnyTypeAnnotation(type);\n  } else if (baseName === \"mixed\") {\n    return isMixedTypeAnnotation(type);\n  } else if (baseName === \"empty\") {\n    return isEmptyTypeAnnotation(type);\n  } else if (baseName === \"void\") {\n    return isVoidTypeAnnotation(type);\n  } else {\n    if (soft) {\n      return false;\n    } else {\n      throw new Error(`Unknown base type ${baseName}`);\n    }\n  }\n}\n\nexport function couldBeBaseType(this: NodePath, name: string): boolean {\n  const type = this.getTypeAnnotation();\n  if (isAnyTypeAnnotation(type)) return true;\n\n  if (isUnionTypeAnnotation(type)) {\n    for (const type2 of type.types) {\n      if (isAnyTypeAnnotation(type2) || _isBaseType(name, type2, true)) {\n        return true;\n      }\n    }\n    return false;\n  } else {\n    return _isBaseType(name, type, true);\n  }\n}\n\nexport function baseTypeStrictlyMatches(\n  this: NodePath,\n  rightArg: NodePath,\n): boolean {\n  const left = this.getTypeAnnotation();\n  const right = rightArg.getTypeAnnotation();\n\n  if (!isAnyTypeAnnotation(left) && isFlowBaseAnnotation(left)) {\n    return right.type === left.type;\n  }\n  return false;\n}\n\nexport function isGenericType(this: NodePath, genericName: string): boolean {\n  const type = this.getTypeAnnotation();\n  if (genericName === \"Array\") {\n    // T[]\n    if (\n      isTSArrayType(type) ||\n      isArrayTypeAnnotation(type) ||\n      isTupleTypeAnnotation(type)\n    ) {\n      return true;\n    }\n  }\n  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